Any "revelation" that seems infinitely profound during a moment of extreme intoxication, but is revealed to be either nonsense or an incredibly basic concept upon attaining sobriety.
"Dude, I spent 4 hours last night going on about how we're all, like, "one people", man. Total espliffany.
The sudden realization or comprehension of the (larger) essence or meaning of something while smoking weed.
WHAT?!?!?! the interconnection between two forms of matter caused by high frequency waves from the matters gravitational pull can allow us to teleport?!??!?! what an Espliffany!!!!!